Choice of an optimum technology and process equipment for friction pair work surface strengthening

The goal of this work is to select and analyze the most relevant scientific and technical information necessary to solve current problems of significantly improving the functional and operational characteristics of machines and mechanisms. The analysis of existing strengthening methods is based on the recognition of the fundamental dependence of the friction characteristics of friction pair work surfaces on the structural phase state of the structural material surface layer. It is stated that the most promising surface strengthening methods are based on the use of a physical action on the surface by concentrated flows of energetic particles. It is asserted that the most promising frictional property modification methods are ion-plasma and beam surface strengthening technologies. This paper presents a comparative analysis of the thirteen most promising surface strengthening methods and their efficiency in solving various problems of improvement of functional and operational characteristics. The comparative analysis is formalized by using a method of expert evaluations. Coating technologies and technologies of diffusion and implantation modification of the friction layer structural phase state are considered. The features of plasma process devices suitable for the implementation of various surface strengthening methods are considered. Recommendations on the optimal use of the available technologies and process equipment are given. Emphasis is given to plasma process devices for combined strengthening. Lines of further development of multifunctional plasma process devices are proposed. The recommendations on the choice of optimum plasma devices and the implementation of various plasma technologies are based on the author’s experience in the development and application of proprietary plasma devices of different types. The results of this work may be used in the development of new, or in the upgrading of existing, vacuum-plasma process equipment.